The second violation was captured in a photograph taken by a San Francisco writer which shows an Uber entering an intersection while the lights are red.

ASSOCIATED PRESS

Uber wrote in a blog that it did not believe it needed a “testing permit” for the self-driving launch as the cars had people behind the wheel.

In a statement published by the Guardian, Uber said: “These incidents were due to human error. This is why we believe so much in making the roads safer by building self-driving Ubers. The drivers involved have been suspended while we continue to investigate.”